Automatic check-valve for sewers.



HENNING BERG AND CHARLES L. JANSEN, OF CHICAGO, ILLINOIS.

AUTOMATIC CHECK-VALVE- FOR SEWERS.

Application filed February 10, 1916.

To all whom it may concern Be it known that we, HENNING BERG and h-iAuLns L. J ANSEN, citizens of the United States, and residents of Chicago, in the county of Cook and State of Illinois, have after more fully set forth and specifically claimed.

The principal object of the invention is to provide a valve of the above mentioned type, which shall be simple and inexpensive in construction, strong, durable and efficient in operation, with its parts so made that the device can be readily installed within the drain pipe or removed therefrom to permit inspection, cleaning, or repair.

Another object is to so construct and arrange the parts of the valve, that it will automatically close the opening of the drain pipe so as to prevent the escape of sewer-gas, as well as the back flow of water from the sewer into the basement or other place where the drain may be located, should the sewer become clogged or flooded.

Other objects and advantages of the invention will be disclosed in the subjoined description and explanation.

In the accompanying drawing which serves to illustrate an embodiment of our invention-Figure 1 is a plan view thereof and Fig. 2 is a vertical sectional view taken on line 2-2 of Fig. 1 looking in the direction indicated by the arrows, showing the parts in their normal positions.

Corresponding numerals of reference refer to like parts throughout the views of the drawing.

\Vhile our invention is more particularly intended for use in the drain pipes which lead from the basement to the sewer, and

while, in the. present. instance we have shown said pipe with its upper end locatedin the reason We do not wish to he understood as Specification of Letters Patent.

Patented May 9, 1916.. Serial No. 77,377.

limiting ourselves in the use of the val e to any particular kind of drain pipe.

In the drawing, the reference numeral 3 designates a section of the cement floor of the basement, or a portion of the ground in which the drain pipe 4 is located, which pipe leads from near the upper surface of the floor or ground 3 to a sewer or sewer pipe, not shown, in the usual way. As shown in Fig. 2 of the drawing, the upper end of the pipe 4 is located within an opening 5 in the ground or floor 3 so that its upper end will be situated at a slight distance from the upper surface of the floor or ground. Located on the upper end of the pipe 4 is an anchor ring 6 which is embedded in the cement 3 and by preference has its upper inner edge provided with a groove 7 in which can be located suitable packing 8 of any desired kind, to form a close jointbetween the an nular flange 9 on the upper end of a circular shell or casing 10 which may be made of any suitable size and material, but preferably of cast iron and tapered toward its lower end as is clearly shown in Fig. 2 of the drawing. The lower end of the shell or casing 10 is formed with a valve seat 11 to receive the upper portion of a float valve 12 which is hollow, and by preference made of copper. The flange 9 of the shell 10 is provided at points diametrically opposite each other on its inner portion with recesses 13 to receive the ends of a cross bar 14 which is provided centrally with a depending lug or boss 15 to which the upper end of a tubular menu ber 16 is secured by means ofv a rod or pin 17 which is extended through suitable open I ings in the tube 16 and boss 15 as will be readily understood. Located in the lower portion of the tubular member 16 is a disk 18 which is held in place by means of inturned flanges 19 on the lower end of said member. The disk 18 is provided centrally with an opening through which is extended a rod 20 which projects into the tubular member 16 and has on its upper end a nut 21 of any suitable material. Interposed between the head 21 and the disk 18 is a coiled spring 22, the tension of which is suiticientto normally hold the float valve 12 in its seated position as shown in Fig. 2, but so that when a small quantity of water enters the casing 10 said spring will yield so as to allow the water to escape between the valve seat 11 and the upper portion of the float valve. The rod 20 is extended centrally through the float valve 12 and fastened to the bottom of the latter. The movement of the rod 20 through the opening in the disk 18 is free, and said disk 18 used as .a' guide for said rod so as to cause the float valve 12 to seat properly.

Located on the upper surface of the flange 9 of the casing 10 is a grated cover 23 of the ordinary or usual construction which can be secured to the said flange by means of screws 24 extended through suitable openings in the cover 23 to engage like openings in the flange 9 of the casing or shell 10. The openings 25 in the cover 23 will permit waterto pass through said opening. yet will catch straw or litter, or in other words, said cover will act somewhat like a strainer.

it will be observed that the outer edges of the cover 23, the flange 9 and the outer surface of the shell or casing 10 are downwardly tapered so that they may be easily withdrawn by removing the screws 24 or readily and accurately placed in position. The float valve 12, tubular member 16 and spring 22 are by preference made of material which will not readily corrode or rust.

'From the foregoing and by reference to the drawing it will be readily understood and clearly seen that by constructing a check valve according to our improvements, the valve 12 will always be maintained by the action of the spring 22 in a closed position so as to prevent the escape of gases from the sewer into the basement, yet whenever water accumulates on the floor or ground 3 it will pass through the openings 25 of the cover into the shell or casing 10- and onto the upper portion of the valve 12, when by reason of the weight of the water within the casing, said valve will be depressed and ,permit the water to pass from the shell or casing 10, out through the drain pipe. In the event of back flow of water by reason of the stoppage or flooding of the sewer, it is apparent that the float valve 12 will be of water through the shell 10 into the basement.

Having thus fully described our invention, what we claim as new and desire to secure by Letters Patent is 1. In an automatic check valve forv sewers and the like, the combination with a drain-pipe, of a downwardly tapered casing located therein and having a valve seat in its lower end and an annular flange at its upper end to provide a support therefor, a bar extended diametrically across the upper end of said casing, a tubular member mounted on the lower surface of said bar. a springactuated rod extended into said member from the lower end thereof, and a floatvalve mounted on the lower portion of said rod and adapted to close the seat therefor of the said casing.

2. In an automatic check valve for sewers and the like, the combination with a drain pipe, of an anchor ring mounted on the upper end thereof and having a groove in its upper inner portion, packing in said groove. a downwardly tapered casing located in said ring and pipe and having a valve seat in its lower end and an annular flange at its upper end to rest on said ring, a bar extended diametrically across said flange and seated at its ends therein. a projection on the central lower portion of the bar, a tubular member fastened to said projection, an apertured disk in the lower end of said memher, a rod extended through said aperture into said member and having a head on its upper end, a spring interposed between said head and disk, and a float valve mounted on the lower portion of said rod to close the seat therefor in the said casing.

Vvitnesses CHAS. C. TILLMAN, A. E. OLSON. 

